Bangla Academy Dictionary:

Definition: 1

Definition: 2

Definition: 3

antecedents. ancestors. the history, events, characteristics, etc., of one's earlier life: Little is known about his birth and antecedents.

Definition: 4

Grammar. a word, phrase, or clause, usually a substantive, that is replaced by a pronoun or other substitute later, or occasionally earlier, in the same or in another, usually subsequent, sentence. In Jane lost a glove and she can't find it, Jane is the antecedent of she and glove is the antecedent of it.

Definition: 5

Mathematics. the first term of a ratio; the first or third term of a proportion. the first of two vectors in a dyad.